Sekirei (セキレイ, lit. Wagtail) is a Japanese manga series. "The Game" or the "Sekirei Plan" organized by Hiroto Minaka, the chairman and founder of the mysterious and powerful MBI Corporation. Minato soon learns that being the partner of a beautiful girl is not all fun and games, especially when he discovers that an Ashikabi can have more than one Sekirei partner—and that's where the real trouble starts for the Ashikabi.